Angular中与后端的数据交互方式(get/post/jsonp)

Love The Way You Lie 2023-03-03 06:23 14阅读 0赞

# 1.Get请求数据 #

//Angular5.x 以后 get、post 和和服务器交互使用的是 HttpClientModule 模块。
    1、在 app.module.ts 中引入 HttpClientModule 并注入
    import {HttpClientModule} from '@angular/common/http';
    
    imports: [
    BrowserModule,
    HttpClientModule
    ]
    
    2、在用到的地方引入 HttpClient 并在构造函数声明
    import {HttpClient} from "@angular/common/http";
    constructor(public http:HttpClient) { }
    
    3、get 请求数据
    var api = "后端接口";
    this.http.get(api).subscribe(response => {
    console.log(response);
    });

# 2.Post 提交数据 #

Angular5.x 以后 get、post 和和服务器交互使用的是 HttpClientModule 模块。
    
    1、在 app.module.ts 中引入 HttpClientModule 并注入
    import {HttpClientModule} from '@angular/common/http';
    imports: [
    BrowserModule,
    HttpClientModule
    ]
    
    2、在用到的地方引入 HttpClient 、HttpHeaders 并在构造函数声明 HttpClient
    
    import {HttpClient,HttpHeaders} from "@angular/common/http";
    constructor(public http:HttpClient) { }
    
    3、post 提交数据
    const httpOptions = {
    headers: new HttpHeaders({ 'Content-Type': 'application/json' })
    };
    
    var api = "后端接口";
    this.http.post(api,{username:'张三',age:'20'},httpOptions).subscribe(response => {
    console.log(response);
    });

# 3.Angular Jsonp请求数据 #

1、在 app.module.ts 中引入 HttpClientModule、HttpClientJsonpModule 并注入
    import {HttpClientModule,HttpClientJsonpModule} from
    '@angular/common/http';
    imports: [
    BrowserModule,
    HttpClientModule,
    HttpClientJsonpModule
    ]
    
    2、在用到的地方引入 HttpClient 并在构造函数声明
    
    import {HttpClient} from "@angular/common/http";
    constructor(public http:HttpClient) { }
    
    3、jsonp 请求数据
    var api = "后端接口";
    this.http.jsonp(api,'callback').subscribe(response => {
    console.log(response);
    });